The present invention relates to a separation component (10) for a feeding bottle device (1) and a corresponding feeding bottle device (1). The separation component (10) provides a separation between a container space (2) of the baby bottle device (1) and a feeding space (3) for providing liquid to an infant, the separation component (10) comprising a hole wall portion (30) surrounding a hole (32) through the separation component (10) for allowing a passage of fluid from the container space (2) to the feeding space (3) therethrough, wherein the hole wall portion (30) is formed such that, when a pressure of the feeding space (3) side is lower than a pressure of the container space (2) side, a minimum cross-sectional area of the hole (32) is reduced with increased pressure difference between feeding space (3) and container space (2). A decreased risk of overfeeding an infant is achieved.
